
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Slf4j
// @MapperScan(basePackages = {"com.mfengbao.oa.mapper"})** 这玩意只能存在一个
@Configuration
@EnableTransactionManagement
public class MybatisPlusConfig {

  /**
   * @param sqlSessionFactory SqlSessionFactory
   * @return SqlSessionTemplate
   */
  @Bean
  public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) {
    return new SqlSessionTemplate(sqlSessionFactory);
  }

  // @Bean(name = "sqlSessionFactory")
  // public SqlSessionFactory sqlSessionFactoryBean(DataSource dataSource) throws Exception {
  //   MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
  //   bean.setDataSource(dataSource);
  //   ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
  //   bean.setMapperLocations(resolver.getResources("classpath*:mapper/*.xml"));
  //   SqlSessionFactory factory;
  //   try {
  //     factory = bean.getObject();
  //   } catch (Exception e) {
  //     throw new Exception(e);
  //   }
  //   return factory;
  // }

  @Bean
  public PaginationInterceptor paginationInterceptor() {
    PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
    // 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求  默认false
    paginationInterceptor.setOverflow(false);
    // 设置最大单页限制数量，默认 500 条，-1 不受限制
    paginationInterceptor.setLimit(-1);
    // 开启 count 的 join 优化,只针对部分 left join
    paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
    paginationInterceptor.setDialectType(DbType.MYSQL.getDb());
    return paginationInterceptor;
  }
}
